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"The linkage also goes together in an odd way. If you put it together the
way it seems it should go, it's harder to operate the choke. The two
clevises hang out behind the levers, rather than straddlings them."
This is something I have not seen yet. I'm new to TR3. I wondered why the=
clevis pin was so long. I'm going to try changing the link to the side t=
o see if that improves the pull. Can't quite see in the picture: Does the=
cable attach to the clevis pin on the opposite side of the arm from the l=
ink?
________________________________
From: Triumphs <triumphs-bounces@autox.team.net> on behalf of Randall <TR3d=
river@ca.rr.com>
Sent: Monday, November 5, 2018 10:20 AM
To: 'Jim Henningsen'
Cc: 'triumphs'
Subject: Re: [TR] TR3A Choke Question
> What kind of oil are you using in the dash pots? If the oil
> is too heavy, it may overdamp the pistons, causing them to
> rise too slowly and momentarily weaken the mixture, causing
> the hesitation. I find 3 in 1 is about the right weight.
Actually, it's just the opposite. Heavier oil makes the mixture go richer
right after you open the throttle. Using oil that is too light can cause a
"lean bog" (like Jim described).
The book actually recommends 30 weight for temps between 40F and 70F; 40
weight above that. Optimum for you may vary somewhat, depending on engine
condition and so forth; but I have always found that performance suffers
with less then 20 weight
> The choke cable is hard to pull
> out. Takes two ands
> > to pull out and then twist to lock. That's to really get the choke
> > levers to move both jets down. Is this normal or maybe I
> need a new choke cable.
Not normal, but unfortunately rather common. Did you polish the jets when
you had the carbs apart? Originals were supplied polished, but the
replacements I've seen have been dull. Dull means a rough finish, which
greatly increases the friction against the glands.
The linkage also goes together in an odd way. If you put it together the
way it seems it should go, it's harder to operate the choke. The two
clevises hang out behind the levers, rather than straddlings them.
I like to replace the gland sping (inside the jet housing) and the return
springs during a rebuild, especially if you don't know the full history of
them. It's not uncommon for people to stretch the gland spring out a bit,
in an attempt to get the glands to quit leaking. The extra pressure
increases friction, to the extent that often the jets won't return after
using the choke. So then they shorten the return spring. Both actions mak=
e
the choke more difficult to operate!
-- Randall
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<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
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<style type=3D"text/css" style=3D"display:none;"> P {margin-top:0;margin-bo=
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</head>
<body dir=3D"ltr">
<div style=3D"color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; f=
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"<span style=3D"display: inline !important; color: rgb(51, 51, 51); fo=
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ne; font-stretch: 100%">The
linkage also goes together in an odd way. If you put it together the=
</span><br style=3D" color: rgb(51, 51, 51); font-family: &quot; font-s=
ize: 14.66px">
<span style=3D"display: inline !important; color: rgb(51, 51, 51); font-fam=
ily: "Segoe UI","Segoe UI Web (West European)","Se=
goe UI",-apple-system,BlinkMacSystemFont,"Roboto","Helv=
etica Neue",sans-serif; font-size: 14.66px; font-size-adjust: none; fo=
nt-stretch: 100%">way
it seems it should go, it's harder to operate the choke. The two</sp=
an><br style=3D" color: rgb(51, 51, 51); font-family: &quot; font-size:=
14.66px">
<span style=3D"display: inline !important; color: rgb(51, 51, 51); font-fam=
ily: "Segoe UI","Segoe UI Web (West European)","Se=
goe UI",-apple-system,BlinkMacSystemFont,"Roboto","Helv=
etica Neue",sans-serif; font-size: 14.66px; font-size-adjust: none; fo=
nt-stretch: 100%">clevises
hang out behind the levers, rather than straddlings them.</span>"</di=
v>
<div style=3D"color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; f=
ont-size:12pt">
<br>
</div>
<div style=3D"color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; f=
ont-size:12pt">
This is something I have not seen yet. I'm new to TR3. I wonder=
ed why the clevis pin was so long. I'm going to try changing the link=
to the side to see if that improves the pull. Can't quite see =
in the picture: Does the cable attach to the clevis pin
on the opposite side of the arm from the link?</div>
<div style=3D"color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; f=
ont-size:12pt">
</div>
<hr tabindex=3D"-1" style=3D"display:inline-block; width:98%">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font color=3D"#000000" face=3D"Calib=
ri, sans-serif" style=3D"font-size:11pt"><b>From:</b> Triumphs <triumphs=
-bounces@autox.team.net> on behalf of Randall <TR3driver@ca.rr.com>=
;<br>
<b>Sent:</b> Monday, November 5, 2018 10:20 AM<br>
<b>To:</b> 'Jim Henningsen'<br>
<b>Cc:</b> 'triumphs'<br>
<b>Subject:</b> Re: [TR] TR3A Choke Question</font>
<div> </div>
</div>
<div class=3D"BodyFragment"><font size=3D"2"><span style=3D"font-size:11pt"=
>
<div class=3D"PlainText"><br>
> What kind of oil are you using in the dash pots? If the oil <br>
> is too heavy, it may overdamp the pistons, causing them to <br>
> rise too slowly and momentarily weaken the mixture, causing <br>
> the hesitation. I find 3 in 1 is about the right weight. <br>
<br>
Actually, it's just the opposite. Heavier oil makes the mixture go ri=
cher<br>
right after you open the throttle. Using oil that is too light can ca=
use a<br>
"lean bog" (like Jim described).<br>
<br>
The book actually recommends 30 weight for temps between 40F and 70F; 40<br=
>
weight above that. Optimum for you may vary somewhat, depending on en=
gine<br>
condition and so forth; but I have always found that performance suffers<br=
>
with less then 20 weight<br>
<br>
> The choke cable is hard to pull <br>
> out. Takes two ands<br>
> > to pull out and then twist to lock. That's to really get th=
e choke <br>
> > levers to move both jets down. Is this normal or maybe I <b=
r>
> need a new choke cable.<br>
<br>
Not normal, but unfortunately rather common. Did you polish the jets =
when<br>
you had the carbs apart? Originals were supplied polished, but the<br=
>
replacements I've seen have been dull. Dull means a rough finish, whi=
ch<br>
greatly increases the friction against the glands.<br>
<br>
The linkage also goes together in an odd way. If you put it together =
the<br>
way it seems it should go, it's harder to operate the choke. The two<=
br>
clevises hang out behind the levers, rather than straddlings them.<br>
<br>
I like to replace the gland sping (inside the jet housing) and the return<b=
r>
springs during a rebuild, especially if you don't know the full history of<=
br>
them. It's not uncommon for people to stretch the gland spring out a =
bit,<br>
in an attempt to get the glands to quit leaking. The extra pressure<b=
r>
increases friction, to the extent that often the jets won't return after<br=
>
using the choke. So then they shorten the return spring. Both a=
ctions make<br>
the choke more difficult to operate!<br>
<br>
-- Randall<br>
</div>
</span></font></div>
</body>
</html>
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